Cycles
The process that changes liquid water into vapor
Evaporation
Too little rainfall is called a ________
drought
Removing fish faster than they can reproduce is called __________.
Overfishing
The process of decaying or rotting
Decomposition
Precipitation is water that falls from the clouds as liquid or solid.
True
What is the earth’s system that includes all of Earth’s water?
Hydrosphere
True or False: Natural stresses are always harmful.
False — they can have benefits too.
Pollution, overhunting, and habitat destruction are examples of what type of stress?
Man-made stresses
The release of water vapor from a plant’s leaves.
Transpiration
Floods can create new habitats.
True
What is the process plants use to create sugar and oxygen?
Photosynthesis
Floods can destroy homes, but what positive effect do they have?
Distribute fertile soil, create new habitats
An organism not native to an ecosystem and harmful is called ________.
Invasive species
A nutrient used to build structures in organisms.
Protein
Threatened species are already extinct.
False — they may become endangered soon
What is required to make Nitrogen usable?
Bacteria and lightning
Name 3 positive effects of fire?
Clears dead trees, recycles nutrients, releases seeds
Define extinct
An organism that no longer exists
The movement of carbon between the atmosphere, earth, and organisms.
Carbon cycle
Overhunting increases animal populations.
False — it reduces them
Explain how photosynthesis and cellular respiration are connected.
Plants produce oxygen & sugar; animals use them for energy and release CO₂ back to plants
Describe succession
A series of gradual changes in populations in an ecosystem.
Name three ways people can wisely manage ecosystems.
Protect habitats, conserve resources, avoid pollution
A natural resource that can be replaced. Give a common example.
Renewable resource - water
Oxygen is produced during cellular respiration.
False — during photosynthesis